Device for driving and controlling fin-shaped propellers



w. MEINDERSMA DEVICE FORDR IVIN G AND CONTROLLING FIN SHAPED PROPELLERS Filed Jui 11, 1928 Illllll I Patented Aug. 26, 1930 UNITED sTAT s PATENT OFFICE WIGGER MEINDERSMA, or wAsssNAAR, nnTn n ANns,nssIs1\Ton or FIFTY PER, CENT To rmnnrvnn SYNDICAAT, BESTAANDE UI nn HEEVREN DR. Wis- ER MEINDERSMA E wassnnennfvooa; AND T ENTY-FIVE PER CENT To 1m. MEINE RUTGERS TE son Avnm-men an ANTON FERDINAND JOI-IANNES: DIJKGRAAE TE v ROTTERDAM, ELK 7003,1331 THE HAGUE, NETHERLANDS, A SYNDICATE OF THE NETHERLANDS Y D EvIc -ror. DRIVING Ann CQNTROLLING FI -SHAPED PEOPELLERS Application filed 1111311, 1928, Serial No. 291,934, at in Switzerland au ust 1, 1927.

The present invention relates to a device for driving andcontrollmg aim-shaped propeller in which the driving means cause the shaft or axis of the propellerto describe an imaginary conical or, other closed suriace, and the controlling means cause the propeller to make half a revolution around its axis during the period in which thesaid closed surface is described once by the propeller g T i steering shaft 3 within the driving shaft 1, 9

instead of on the outside thereof, Fig. 2 show i I T -ing an embodiment of this.

shaft.

According tothe invention, the controlling action is effectedby. means :oftwo toothed Wheels or the like which are in direct engagement, having the same direction of rotation,

one of them being connected with the propeller and the other being connected with a steering shaft, the first wheel having twice as many teeth as the second one; these two wheels constituting the'entire coupling between the steering shaft and the propeller if desired. f I t Various embodiments of the invention are illustrated in the accompanying drawings,-

w-herein; I

Figure 1 1S, a-section, partly 1n side vlew, of one of the embodiments;

Fig. 2 shows a modificationof Fig. 1 in which the steering shaft s arranged inside thodriving shaft) In the embodiment accordingto Fig.1, l'is the driving shaii't over which the steering shaft 3 fits and which is provided with a crank 2 having a crank pin 22 formed with it.

' On the steering shaft 3- a gear t'with eXternal straight or spur teeth isi'nou'nted, which I gear mesheswith the internalteeth (likewise straight) of anannular or skeleton gear or plete conical surface, it also makes half a' revolut on aroundits ax s; If the steering 'shaft 3 is rotated, the position of the pro pellerwill be changed, resulting in a change,

in the direction of propulsion, so that the ship may be steered in this way the direction of propulsion being variable through the It is, of course; also possibleto arrange the line or axis describes a conicalsurface,.n0r to the precise structural details illustrate'd. V

I claimas my invention z i I llechanism for driving and steering atfinshaped propeller, comprising a rotatingpropeller shaft mounted to describe an imagi nary closed surface during its rotation, driv iI g means and steering means therefor, and

controlling connections between the steering .means and the propeller shaft for causing v the latter to make a'half-revolution about its axis during the time it describes one such closed surface; said connections embodying an: nternally-toothed spur wheel connected to "the propeller shaft andan externally-toothed spur wheel directly in-inesh therewith and connected to. the steering means, one of said connections being flexible;

1 In testimony whereof I arlix my si n ature.

wheel 6, which is rotatably, mountedon the I 2 pin 22.- The number of teeth'of the gear 6 a The propelleris twice that of the gear 4:.

shaft 7 is flexibly connected at 5-withthe 5 I V gearing and is supported universally rotat-f b y t s of a ball-shaped part 16.

n; the driving shaft is driven in the: steering shaft 3 is kept stationary, the proin a bearin in the shipshull. by means peller shaft 7' (or,-more precisely speaking,. I its centre line or axis) describes an imaginary, i

conical surface; and, -during theperiod in which the. propeller'shaft describes one comieera MEIN R A GERTIFIGATE OF CORREGHON.

Patent No. 1,774,206. Granted August 26, 1930, to

WIGGER MEINDERSMA.

It is hereby certified that the above numbered patent was erroneously issued "50 per cent to Findriven Syndicaat, Bestaande uit de hceren Dr. Wigger Meindersma te Wassenaar Voor, and 25 per cent to Dr. Meine Rutgers te s- Gravenhage en Anton Ferdinand Johannes Dijkgraai te Rotterdam, elk voor, of The Hague, Netherlands, a syndicate of The Netherlands", whereas said patent should have been issued to Findr-iven Syndicaat, Bestaande uit de heeren Dr. Wigger Meindersma te Wassenaar voor 50 per cent, and Dr. Meine Rutgers te s-Gravenhage en Anton Ferdinand Johannes Dijkgraaf te Rotterdam, elk voor 25 per cent, of The Hague, Netherlands, a syndicate of The Netherlands, as shown by the records of assignments in this office; and that the said Letters Patent should be read with this correction therein that the same may conform to the record of the case in the Patent Office.

Signed and sealed this 21st day of October, A. D. 1930.

M. J. Moore, (Seal) Y Acting Commissioner of Patents. 

